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I-25 Service Road over South Fork Powder River

Johnson County, Wyoming · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

I-25 Service Road over South Fork Powder River in Johnson County, Wyoming, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1932, making it 93 years old at the 2025 inventory.
It carries about 79 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 141 of the 204 inventoried bridges in Johnson County rated fair (69.1%); 7 (3.4%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings

Source: FHWA National Bridge Inventory, 2025 data as reported by the Wyoming department of transportation.

Bridge	Built	Vehicles/day	Condition
I-25 / US 87 Bus over Clear Creek	1975	5,733	Fair
I-90 Wbl over Jo CR 213 (Monument Rd)	1966	3,990	Fair
I-90 Wbl over Jo CR 1 (Rock Creek Rd)	1963	3,990	Fair
I-90 Ebl over Jo CR 39 (Lake Ridge Rd)	1966	3,980	Fair
I-90 Ebl over Jo CR 1 (Rock Creek Rd)	1963	3,980	Fair
I-90 Wbl over Piney Creek	1966	3,740	Fair